A Rare Fancy Coloured Diamond and Diamond Ring


The cushion-shaped fancy brownish red diamond, weighing 1.30 carats, between similarly cut diamond shoulders, ring size 5½
|Accompanied by a GIA report stating that the 1.30 carat diamond is Natural Fancy Brownish Red colour. Report number 2165505734, dated 5 August 2015.Accompanied by a GIA monograph entitled 'The Bordeaux Red'.1.30克拉天然彩棕紅色'波爾多酒紅'鑽石配鑽石戒指戒指尺寸5½,附GIA證書Red is the rarest of all coloured diamonds and like pink diamonds, they are created through a process known scientifically as "Plastic Deformation". Such is their rarity that GIA (Gemological Institute of America) records show that from 1957 to 1987, not one laboratory report was issued for a diamond with "red" as the only descriptive term. Today, only a handful of red diamonds are recovered every few years, with the majority weighing considerably less than 1 carat. The largest red diamond graded by the GIA is the Moussaieff Red which weighs 5.11ct and which came from Brazil. While all other coloured diamonds come in several intensity levels (Fancy, Fancy Intense, Fancy Vivid, Fancy Deep, etc), red diamonds come in just one intensity level – Fancy - and they can only be modified by 3 colours: purple, orange or brown. Thus, red diamonds are only ever graded as Fancy Red, Fancy Brownish Red, Fancy Orangey Red, Fancy Purplish Red. While the Moussaieff Red hails from Brazil, most red diamonds today come from the Argyle Mine in Western Australia. Production has dropped significantly in the last decade and the Argyle Mine recently announced that they will close by 2021, thereby removing the world's foremost supplier of red and pink diamonds, which in turn will render those currently available even rarer. 紅色鑽石在所有彩色鑽石中是最稀有的，並且如粉色鑽 石一般，其顏色成因是科學上所稱的"塑性變形"。 紅色鑽石彌足珍貴，據GIA（美國寶石學院）記錄顯示，自 1957至1987年間，沒有一份鑒定報告是只以"紅色" 作為顏色描述的。 現今，每隔幾年才發現少數量的紅色鑽石,其中大部分小 於1克拉。 GIA迄今評級過最大的紅色鑽石是來自巴西的5.11克拉"穆薩耶夫紅鑽（Moussaieff Red）"。 所有其他彩色鑽石都有不同的顏色濃度等級（彩，濃 彩，艷彩，深彩等），但紅色鑽石卻只有一個"彩" 的濃度等級 ，而且只有3種顏色變調：紫色，橙色或棕色。因此，紅色鑽石只被評定為彩紅色，彩棕紅色，彩橙紅色，及彩紫紅色。 儘管穆薩耶夫紅鑽（Moussaieff Red）來自巴西，但現今大多數紅鑽都產自西澳洲的Argyle礦。其產量在過去的十年裡大幅下降，加上Argyle礦最近宣布即將於2021 年關閉，意味着世界上最重要的紅色及粉色鑽石供應將會不復存在，這促使已開採出的鑽石顯得更為罕有。Natural coloured diamonds can be found in almost every colour of the rainbow from yellow to green to purple to orange to the rarest of all: red. They have historically been found in all diamond mines around the world from South America to Africa to North America and Eurasia. Due to various geological differences, some mines have produced more colours than others. The colours transpire when certain elements are captured within the diamond structure as it is forming from carbon atoms deep within the earths mantle. Shifting pressures and heat can also affect and determine colour by causing the atomic structure to alter slightly in a process which scientists refer to as "Plastic Deformation". The GIA (Gemological Institute of America) grades Fancy coloured diamonds in 12 colour categories with over 90 secondary hues and 9 grades of colour saturation, which results in over 230 colour combinations.在天然彩色鑽石中幾乎可以找到彩虹中的每一種顏色，從黃色、綠色、紫色到橙色， 以至最珍罕的紅色。世界各地的鑽石礦中都有發現彩色鑽石，包括南美洲、非洲及北美洲，乃至歐亞大陸。由於地質上的差異，一些礦區出產的鑽石較其他地區顏色多。 這些顏色的成因是在鑽石形成過程中有特定的微量元素出現於碳原子的結構內, 而另一個取決顏色的因素, 是壓力及熱量轉移, 導至略微改變了原子結構, 這過程被科學家稱之為"塑性變形"。 GIA（美國寶石學院）對彩色鑽石進行12種顏色類別的評級，加上90種以上的二級色 調,以及9個級別的色彩飽和度，從而產生超過230種顏色組合結果。